Nate Solder's return from injury among areas to watch on Patriots' offense

FOXBOROUGH, Mass. -- With the New England Patriots holding their first training camp practice on Thursday, let's start off the week with a key question/area of focus with each position, starting on offense:

Quarterbacks: Tom Brady, Jimmy Garoppolo, Jacoby Brissett

What to watch for: Is there a noticeable shift in repetitions given that Garoppolo will start the first four games? My eductaed guess is no, until possibly deeper into training camp. Also, does coach Bill Belichick see value in adding another signal-caller to fill the final spot on the 90-man roster?

Running backs: Dion Lewis, LeGarrette Blount, James White, Brandon Bolden, Donald Brown, Joey Iosefa, Tyler Gaffney, D.J. Foster

What to watch for: Are Lewis (left ACL) and Blount (hip) ready to go for the first day of camp? Lewis returned to practice on the final day of June's mandatory minicamp, while Blount didn't practice in the spring.

Fullback: James Develin

What to watch for: Develin missed the 2015 season with a broken leg; can he return to past form?

Tight end: Rob Gronkowski, Martellus Bennett, Clay Harbor, A.J. Derby, Steven Scheu, Bryce Williams

What to watch for: Gronkowski and Bennett should see plenty of time working together in practice, with the main question who wins the competition for the No. 3 role after Michael Williams tore his ACL in June's mandatory minicamp.

Wide receiver: Julian Edelman, Danny Amendola, Chris Hogan, Malcolm Mitchell, Keshawn Martin, Aaron Dobson, Nate Washington, Chris Harper, DeAndre Carter, Devin Lucien, Matthew Slater

What to watch for: How are the recoveries of Edelman (left foot) and Amendola (knee/ankle) progressing, and who wins the battle for the No. 5 spot behind roster locks Edelman, Amendola, Hogan and Mitchell?

Offensive tackle: Nate Solder, Sebastian Vollmer, Marcus Cannon, LaAdrian Waddle, Cameron Fleming, Keavon Milton

What to watch for: How is Solder's return from a biceps injury progressing after he didn't practice in the spring?

Guard/center: Bryan Stork, David Andrews, Josh Kline, Shaq Mason, Tre' Jackson, Joe Thuney, Jonathan Cooper, Ted Karras, Chris Barker, Kyler Kerbyson

What to watch for: In what might be the most wide-open competition on the entire roster, who emerges at all three interior spots? Stork is being challenged by Andrews, while at guard, newcomers Thuney (left) and Cooper (right) took the majority of top reps in the spring.